Chapter 9
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Created by:
JoshTaylor on May 19, 2009
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13 terms
Terms | Definitions |
|---|---|
 vaccine | a substance that is prepared from killed or weakend disease causing agents including certain bacteria |
| virulent | able to cause disease |
| transformation | a change in genotype caused when cells take up foriegn genetic material |
| bacteriophage | a virus that infects bateria |
| double helix | two strands twisted around eachother |
| nucleotide | subunits that make up DNA |
| deoxyribose | the five-carbon sugar in DNA nucleotides |
| base-pairing rules | the structure and size of the nitrogen bases allows for only these two paired combination |
| complimentary base pairs | the sequence of the strand on one strand determinesthe sequence of bases on the other strand |
| DNA replication | the processof making a copy of DNA |
| DNA helicase | open the double helix by breaking the hydrogen bonds that link the complimentary nitrogen bases between the two strands |
| replication fork | the areas where the double helix seperates |
| DNA polymerase | move along each of the DNA strands, adding nucleotides to exposed nitrogen bases according to the base pair rules |
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